protected internal virtual void SetEvaluationOutput(DmnDecisionTableImpl decisionTable,
IList <DmnDecisionTableRuleImpl> matchingRules, IVariableContext variableContext,
DmnDecisionTableEvaluationEventImpl evaluationResult)
{
var decisionTableOutputs = decisionTable.Outputs;
IList <IDmnEvaluatedDecisionRule> evaluatedDecisionRules = new List <IDmnEvaluatedDecisionRule>();
foreach (var matchingRule in matchingRules)
{
var evaluatedRule = EvaluateMatchingRule(decisionTableOutputs, matchingRule, variableContext);
evaluatedDecisionRules.Add(evaluatedRule);
}
evaluationResult.MatchingRules = evaluatedDecisionRules;
}
public virtual IDmnDecisionLogicEvaluationEvent Evaluate(IDmnDecision decision, IVariableContext variableContext)
{
var evaluationResult = new DmnDecisionTableEvaluationEventImpl();
evaluationResult.DecisionTable = decision;
var decisionTable = (DmnDecisionTableImpl)decision.DecisionLogic;
evaluationResult.ExecutedDecisionElements = CalculateExecutedDecisionElements(decisionTable);
EvaluateDecisionTable(decisionTable, variableContext, evaluationResult);
// apply hit policy
decisionTable.HitPolicyHandler.apply(evaluationResult);
// notify listeners
foreach (var evaluationListener in EvaluationListeners)
{
evaluationListener.Notify(evaluationResult);
}
return(evaluationResult);
}
protected internal virtual void EvaluateDecisionTable(DmnDecisionTableImpl decisionTable,
IVariableContext variableContext, DmnDecisionTableEvaluationEventImpl evaluationResult)
{
var inputSize = decisionTable.Inputs.Count;
IList <DmnDecisionTableRuleImpl> matchingRules = new List <DmnDecisionTableRuleImpl>(decisionTable.Rules);
for (var inputIdx = 0; inputIdx < inputSize; inputIdx++)
{
// evaluate input
var input = decisionTable.Inputs[inputIdx];
var evaluatedInput = EvaluateInput(input, variableContext);
evaluationResult.Inputs.Add(evaluatedInput);
// compose local variable context out of global variable context enhanced with the value of the current input.
var localVariableContext = GetLocalVariableContext(input, evaluatedInput, variableContext);
// filter rules applicable with this input
matchingRules = EvaluateInputForAvailableRules(inputIdx, input, matchingRules, localVariableContext);
}
SetEvaluationOutput(decisionTable, matchingRules, variableContext, evaluationResult);
}